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Bad White [126]
3 years ago
9

Need help with this math problem

Mathematics
1 answer:
Jet001 [13]3 years ago
6 0
I had to do several calculations to get the answer.

First I calculated how many points each incorrect answer decreased:

6 questions * x = 30 points => x = 30 points / 6 questions = 5 points / question.

Then I converted it in an equation of the kind:

( ) ( ) = 5

And concluded it was 1/6 * 30 = 5

So, the numbers must be placed on either of these two forms:

( 1/6 ) ( 30) = 5, or

( 30 ) ( 1/ 6) = 5.

Of course, both of them are correct answers.
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Alex Ar [27]

According to the given graph, the variables does not show a proportional relationship because they points do not form an straight line. Remember that the proportional relationship is represents by a straight line whcih passes through the origin.

<h2>Therefore, the hours and the height of snow do not show a proportional relationship.</h2>
4 0
1 year ago
Write the expression 2a+b in the form of a fraction with the given denominator. Check if the domain of the expression changed. I
Ymorist [56]

Answer:

See below

Step-by-step explanation:

I will assume the given denominator is 3a as there is nothing attached to the statement.

Lets first look at the domain of 2a+b. As it is a polynomial with unknowns a and b, we know it has its domain in all real numbers for both  a and b as every polynomial does. For verifying it replace a and b by any real number you can think of.

Domain = a, b belonging to R

Now, if we divide 2a+b by 3a we will have:

(2a+b)/3a

As know we don not have a polynomial we cant state that the domain will still be all the real numbers for sure. We need to go further.

We have a fraction and as every fraction the denominator CAN'T be equal to 0, so 3a MUST be different to 0. This means that a MUST be different to 0. So, now our domain changes:

domain' = a, b belonging to R and a different to 0.

6 0
4 years ago
A teacher needs 256 lengths of string cut to 40cm each. If balls of string are 30M long, how many balls are needed?
Otrada [13]
First you need to work out how much string is needed -
256 pieces needed x 40cm each:
256 x 40 = 10240cm

Then, convert to metres (100cm = 1m)
10240 / 100 = 102.4m

Then, you work out how many balls are needed:
30 can fit into 102.4 3 times with .41m to spare. So, you need three balls of string, PLUS another one to cover the 41cm

So to conclude: 4 balls of string are needed.
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3 years ago
A culture started with 5,000 bacteria. After 4
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Answer:

5000 * (e^((1 /4) * ln(55 / 50) * (13))) = 6,815.47

Step-by-step explanation:

7 0
3 years ago
When you open a stepladder, you use a brace on each side of the ladder to lock the legs in place. Explain why the triangles form
navik [9.2K]

Answer:

so it can have a better balence

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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